Photographic recording apparatus for vibratory rays of light.



No. 655,677. Paiemed Aug. 7, |900.

7 A. PuLLAK a J. vmAa. PHOTUGRAPHIC RECORDING APPARATUS FOR VIBBATURY RAYS DF LIGH'I'.

' (Application med me. 14, 1899.)

(Nb model.)

Hammam* WITNESSES; l

Srafrns PATENT OFFICE. l

ANTON POLLAK AND' JOSEF VIRAG, OF BUDA-PESTH, AUSTRIArIIUNGARY. y

PHOTOGRAPHIC RECORDING APPARATUS FOR VlIBRATORY RAYS F LIGHT.

SPECIFICATION formingpart of Letters Patent No. 655,677, .dated August 7, 1900. Application filed. December 14, 1899. Serial No. 740,234. '(No model.)

To all whom it may concern.:

Be it known that we, ANTON POLLAK and JOSEF Viene, subjects of the Emperor of .Austria-Hungary, residing at Buda-Pesth, in

the Empire of Austria-Hun gary, have invented certain new and useful Improvements in Photographic Recording Apparatus for Vibratory Rays of Light, of'wliich the following is a'specitication.

'Ifhis invention relates vto a photographic registering apparatus for recrdin g vibratory movements upon a sensitized strip or sheet,

' so that the vibratory curves are recorded in parallel rows at right langles to the direction of the movement of the'strip or sheet.

Our invention may be used as a recording device for any suitable apparatus for varying a ray of light-such, for instance, as mirrorgalvanometers--but is especially applicable Vfor use in connection with the apparatus for rapid telegraphic transmission set forth inA our application tiled May 9, 1899, Serial No.

In the annexed drawings, Figurel shows the apparatus partly in side view andpartly in section on the line 1 1 of Fig. 2.` Fig. 2

shows in its upper part a section on the line ror 3 is connected to any moving body, the' 2a, and in its lower part a section on the line 2b, of Fig. 1.

1 is a source of light of any suitable nature, i

,from which is projected a beam or bundle of light-'rays through the narrow elongated slit' 2 upon a concave mirror 3. This concave mirvibrations of which are to be recorded in such manner that, owing to this connection, the mirror performs vibratory movements upon an axis parallel to the slit 2 above referred to. In the application illustrated in the drawings, the mirror is, for instance, shown connected to the diaphragm of a telephone. The vibraeach other with holes, and over each hole a cylinder-lens 9 is fastened to the ribbon in siich manner that, the geometric axes of these lenses 9 form right angles with the direction of movement of the ribbon. Rotary motion is imparted to the roller? bya suitable motorfor instance, a clockwork 1Owhicl1 causes the ribbon 8 to travel in the direction shown by the arrow. On their way between the rollers 6 and 6 each of the lenses will allow part of the reflected bundle of rays of light to be passed through such lens. The focal distanceof the cylinder-lenses 9 is so adj usted that such part of the" ray of 'light 4 as is caught by a lens is concentrated at the plane 5 to an intense focus.V An elongated sheet'or strip c of sensitized paper is fed slowly forward in the direction of the arrow by the rollers-11V and 12 and moves inthe plane 5, so

that the abovelmentio'ned concentra-ted point I of light is'formed upon its sensitized coating.

It is obvious that the sensitized paper must be protected against any other lightin a lightproof box 15 and after the exposure should be collected in a light-proof lreceptacle-'as,`

for example, like a film cartridge In the rear of the sheet of sensitizedpaper a red observation-glass 14 may. be provided in the box 15, so that the-vibrations of the point of light during the exposure maybe observed.

The distance between the individual lenses 9 uponthe endless ribbon 8 corresponds ex actly to or is slightly smaller than thewidth of the sheet of sensitized paper 16. i

The operation of the apparatus is as follows: in order to record the vibrating rays] of light 4, the motor driving the endless ribbon 8 and the sensitized sheet 16 in the di rection shown is started. The abovedescribed optical mechanism forms upon lthe sensitized paper a very sharp point of light, which, owing to the vibrations of the mirror 3, vibrates in a vertical direction and also performs a continuous horizontal 'motion, ow ing to the movement of the cylinderlenses 9. As soon as one of the lenses 9has, passed beyond'the sensitized sheet 16,0r slightly before, the next following lens becomes operative and again causes the vibrating point of light to travel transversely across the sheet ofpaper 16; but meanwhileths sheet ofsensitized paper 16 has also traveled a certain'distance in a direction at right angles to lthat of the direction of movement of the endless ribbon- 'Ico 8, so that the following vibratory 'curve is rey corded upon the sensitized sheet ata distance corresponding to the travel of the sheet. 'lhe record is th ns made in successive lines, which,

5 like the lines in aprinted book, are'read from left to right.

The'developing and Iixing ofl the exposed sensitized -sheet may be effected in any known manner.

What we claim is- A l. The combination with means for varying a beam of light, a sensitive sheet, and means `for advancing the sheet, of means traveling transversely to the sheet for directing said beam across the sheet in successive lines.

' 2. .Thecombination withmeans for varying a beam of light, a sensitive sheet, and means for advancing the sheet,4 ot a lens fordirecting said beam across the sheet in successive lines.

3. The combination with means for varying a beam of light, a sensitive sheet, and means for advancing the sheet, of a plurality of lenses for directing said beam across said sheet in'suecessive lines, said lenses spaced apart a distance corresponding to the desired length of the lines.

`4. Thecombination with means for varying a beam of light, asensitive sheet, and means for advancing the sheet, an opaque traveling nibbon moving across said sheet, and having openings at intervals, and means adapted to direct light through said openings.

to successively direct a 'part of said beam across the strip. I

6. The combination with means for moving. a broad and thin beam of light, a sensitive,d

sheet, and'means for advancing the sheet, o'f l means for directing said light across the sheet in successive lines, comprising an endless opaque, ribboncontinuonsly moving across said sheet at greater speed than the travel of the sheet, said ribbon having openings spaced apart a distance corresponding to the desired length of the lines, and aveylinder-lens ea'rried by theribbon at each opening.

In witness whereof we have hereunto signed our names in the presence of the subscribing witnesses. v ANTON POLLAK. JOSEF VlRAG. Witnesses as to Anton Pollak: ADOLPH -D. WEINER, F. A. HUBBARD. Witnesses as to Josef Virag:

EUGENE V. MYERS, AGNES I. DUNN. 

